JP6781994B2 - Nozzle and spray - Google Patents

Nozzle and spray Download PDF

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Publication number
JP6781994B2
JP6781994B2 JP2019545004A JP2019545004A JP6781994B2 JP 6781994 B2 JP6781994 B2 JP 6781994B2 JP 2019545004 A JP2019545004 A JP 2019545004A JP 2019545004 A JP2019545004 A JP 2019545004A JP 6781994 B2 JP6781994 B2 JP 6781994B2
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flow path
nozzle
tip
diameter
spray
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JPWO2019065405A1 (en
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和三 稲垣
和三 稲垣
振一 宮下
振一 宮下
紳一郎 藤井
紳一郎 藤井
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National Institute of Advanced Industrial Science and Technology AIST
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/02—Spray pistols; Apparatus for discharge
    • B05B7/04—Spray pistols; Apparatus for discharge with arrangements for mixing liquids or other fluent materials before discharge
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/24—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas with means, e.g. a container, for supplying liquid or other fluent material to a discharge device
    • B05B7/26—Apparatus in which liquids or other fluent materials from different sources are brought together before entering the discharge device

Description

本発明は、スプレー用のノズルおよびスプレーに関する。 The present invention relates to nozzles for spraying and spraying.

様々な液体を気体によって微細液滴化する噴霧技術は、乾燥造粒、塗装、焼結造粒、滅菌や消毒、農薬散布等、多くの用途に用いられている。液体を気体によって微細液滴化することで、表面積が増大し乾燥や反応などのプロセスを促進したり、気体の断熱膨張により液滴を冷却したりすることができる。噴霧される液体は、塗料、微粒子を含む分散液や増粘性ゲルを含む液体等、多岐に亘っている。 Spraying technology that atomizes various liquids into fine droplets with gas is used in many applications such as dry granulation, painting, sintering granulation, sterilization and disinfection, and spraying pesticides. By making a liquid into fine droplets with a gas, the surface area can be increased to promote processes such as drying and reaction, and the droplets can be cooled by adiabatic expansion of the gas. The liquid to be sprayed includes a wide variety of liquids such as paints, dispersions containing fine particles, and liquids containing thickening gels.

気体と噴霧される液体を加圧して、ノズル内部で、外環流路を流れる気体を液体が流れる内管流路に侵入させて混合し噴射する構造のノズルが知られている（例えば、特許文献１参照。）。 A nozzle having a structure in which a gas and a liquid to be sprayed are pressurized, and a gas flowing through an outer ring flow path is allowed to enter an inner pipe flow path through which the liquid flows, and mixed and injected is known (for example, Patent Document). See 1.).

国際公開第２０１７／０４０３１４号International Publication No. 2017/040314

本発明の目的は、様々な種類の噴霧液の微細液滴化が可能で、目詰まりが生じ難いノズルおよびそのノズルを備えるスプレーを提供することである。 An object of the present invention is to provide a nozzle capable of forming various types of spray liquid into fine droplets and less likely to cause clogging, and a spray provided with the nozzle.

本発明の一態様によれば、スプレー用のノズルであって、噴霧液供給用の第１の流路を有する管体と、上記管体を囲む、気体供給用の第２の流路であって、上記第２の流路は、その流路面積が、上記管体の先端に向けて漸次縮小されてなる、上記第２の流路と、上記管体の先端に対して離隔して設けられ、上記噴霧液の微細液滴を噴射する噴射口であって、上記噴射口の開口径は、上記管体の先端の開口径よりも小さい、上記噴射口と、を備える、上記ノズルが提供される。 According to one aspect of the present invention, there is a nozzle for spraying, a tube body having a first flow path for supplying a spray liquid, and a second flow path for gas supply surrounding the tube body. The second flow path is provided so as to be separated from the second flow path, the flow path area of which is gradually reduced toward the tip of the tube, and the tip of the tube. Provided by the nozzle, which comprises an injection port for injecting fine droplets of the spray liquid, wherein the opening diameter of the injection port is smaller than the opening diameter of the tip of the tubular body. Will be done.

上記態様によれば、噴霧液を供給する第１の流路を有する管体を囲む気体供給用の第２の流路がその流路面積が管体の先端に向けて漸次縮小されているので、第２流路を流れる気体の線速度が増加して噴射される。これにより、線速度が増加した気体が噴霧液に衝突することで噴霧液の微細液滴化が促進されるとともに、液体の内容物がノズルの噴射口付近に付着し難くなり目詰まりが生じ難くなり、さらに、管体の先端に対して離隔して設けられた噴射口の開口径が管体の先端の開口径よりも小さいので、噴霧液と気体とがより混合し易くなり、噴霧液の微細液滴化が促進されたノズルを提供できる。 According to the above aspect, the area of the second flow path for gas supply surrounding the tube body having the first flow path for supplying the spray liquid is gradually reduced toward the tip of the tube body. , The linear velocity of the gas flowing through the second flow path is increased and injected. As a result, the gas with increased linear velocity collides with the spray liquid, which promotes the formation of fine droplets of the spray liquid, and also makes it difficult for the contents of the liquid to adhere to the vicinity of the injection port of the nozzle and cause clogging. Further, since the opening diameter of the injection port provided at a distance from the tip of the tube is smaller than the opening diameter of the tip of the tube, the spray liquid and the gas can be more easily mixed, and the spray liquid can be mixed. It is possible to provide a nozzle in which fine droplet formation is promoted.

本発明の他の態様によれば、噴霧液の供給源と接続可能な第１の流路の後端部に連通する第１の接続部と、気体の供給源と接続可能な第２の流路の後端部に連通する第２の接続部と、上記態様のノズルと、を備えるスプレーが提供される。 According to another aspect of the invention, a first connection that communicates with the rear end of the first flow path that can connect to the spray source and a second stream that can connect to the gas source. A spray comprising a second connection that communicates with the rear end of the road and a nozzle of the above aspect is provided.

上記態様によれば、噴霧液の微細液滴化が可能で目詰まりが生じ難いノズルを備えるスプレーを提供できる。 According to the above aspect, it is possible to provide a spray provided with a nozzle capable of forming fine droplets of the spray liquid and less likely to cause clogging.

本発明の一実施形態に係るスプレーの断面図である。It is sectional drawing of the spray which concerns on one Embodiment of this invention. 本発明の一実施形態に係るノズルの断面図である。It is sectional drawing of the nozzle which concerns on one Embodiment of this invention. 本発明の一実施形態に係るノズルの噴射時の動きを示す図である。It is a figure which shows the movement at the time of injection of the nozzle which concerns on one Embodiment of this invention. 本発明の一実施形態に係るノズルの変形例（変形例１）の断面図である。It is sectional drawing of the modification (modification example 1) of the nozzle which concerns on one Embodiment of this invention. 本発明の一実施形態に係るノズルの変形例（変形例２）の断面図である。It is sectional drawing of the modification (modification example 2) of the nozzle which concerns on one Embodiment of this invention. 本発明の一実施形態に係るノズルの変形例（変形例３）の断面図である。It is sectional drawing of the modification (modification example 3) of the nozzle which concerns on one Embodiment of this invention. 本発明の一実施形態に係るノズルの変形例（変形例４）の断面図である。It is sectional drawing of the modification (modification example 4) of the nozzle which concerns on one Embodiment of this invention. 本発明の一実施形態に係るノズルの変形例（変形例５）の断面図である。It is sectional drawing of the modification (modification example 5) of the nozzle which concerns on one Embodiment of this invention. 本発明の一実施例に使用した噴霧液の特性を示す図である。It is a figure which shows the characteristic of the spray liquid used in one Example of this invention.

以下、図面に基づいて本発明の一実施形態を説明する。なお、複数の図面間において共通する要素については同じ符号を付し、その要素の詳細な説明の繰り返しを省略する。 Hereinafter, an embodiment of the present invention will be described with reference to the drawings. Elements common to a plurality of drawings are designated by the same reference numerals, and the repetition of detailed description of the elements will be omitted.

図１は、本発明の一実施形態に係るスプレーの断面図である。図１を参照するに、本実施形態に係るスプレー１０は、ケーシング１１に、噴霧液の供給源と接続可能な第１接続部１２が設けられ、例えば、噴霧液を貯蔵する容器２１からポンプ２２によって噴霧液Ｌｆが第１接続部１２に供給される。このスプレー１０は、さらに、ケーシング１１に、気体の供給源と接続可能な第２接続部１３が設けられ、例えば、ガスボンベ２３やガスタンクからバルブ２４を介してコンプレッサーやドライヤー等によって気体Ｇｆが第２接続部１３に供給される。 FIG. 1 is a cross-sectional view of a spray according to an embodiment of the present invention. With reference to FIG. 1, in the spray 10 according to the present embodiment, the casing 11 is provided with a first connection portion 12 that can be connected to a supply source of the spray liquid, and for example, a container 21 for storing the spray liquid to a pump 22. The spray liquid Lf is supplied to the first connecting portion 12. In this spray 10, the casing 11 is further provided with a second connection portion 13 that can be connected to a gas supply source, and for example, the gas Gf is seconded by a compressor, a dryer, or the like from a gas cylinder 23 or a gas tank via a valve 24. It is supplied to the connection unit 13.

ケーシング１１は、その内部に管体１４を有する。管体１４は第１流路１５を有し、その後端１４ｄに第１接続部１２が設けられている。ケーシング１１は、その内面（以下、「大径面」と称する。）１１ａと管体１４の外面（以下、「小径面」と称する。）１４ｂとにより形成された第２流路１６を有する。第２流路１６は、管体１４を囲むように形成され、例えば環状である。第２流路１６は、その中心軸Ｘが管体１４の中心軸と実質的に共通である。 The casing 11 has a tubular body 14 inside. The tubular body 14 has a first flow path 15, and a first connecting portion 12 is provided at the rear end 14d. The casing 11 has a second flow path 16 formed by an inner surface (hereinafter, referred to as “large diameter surface”) 11a thereof and an outer surface (hereinafter, referred to as “small diameter surface”) 14b of the tubular body 14. The second flow path 16 is formed so as to surround the tubular body 14, and is, for example, annular. The central axis X of the second flow path 16 is substantially common to the central axis of the tubular body 14.

スプレー１０は、ケーシング１１の先端部にノズル１８が設けられる。ノズル１８は、その内部で、管体１４の先端１４ｃの開口から噴出される噴霧液と第２流路１６の出口１６ａから噴出される気体とが混合することで噴霧液Ｌｆが微細液滴化され、噴射口１９から噴射される。 The spray 10 is provided with a nozzle 18 at the tip of the casing 11. Inside the nozzle 18, the spray liquid Lf is made into fine droplets by mixing the spray liquid ejected from the opening of the tip 14c of the tubular body 14 and the gas ejected from the outlet 16a of the second flow path 16. It is injected from the injection port 19.

噴霧液Ｌｆは、特に限定されないが、例えば、溶解液、分散液、ゲル状物質を含む液、またはエマルションである。噴霧液Ｌｆは、例えば、塗料、農薬や消毒剤などの薬液、高塩濃度液、粘度の高い高分子分散液、粒径がナノメートルあるいはマイクロメートルのオーダーの微粒子を液体に分散させた分散液、スラリー等である。噴霧液Ｌｆは、容器２１に貯蔵され、例えば流量調整が可能なポンプ２２により加圧され、送液されて第１接続部１２を介して第１流路１５に供給される。 The spray liquid Lf is not particularly limited, and is, for example, a solution, a dispersion, a liquid containing a gel-like substance, or an emulsion. The spray liquid Lf is, for example, a paint, a chemical solution such as a pesticide or a disinfectant, a high salt concentration solution, a highly viscous polymer dispersion solution, or a dispersion solution in which fine particles on the order of nanometers or micrometers are dispersed in a liquid. , Slurry, etc. The spray liquid Lf is stored in the container 21, is pressurized by, for example, a pump 22 capable of adjusting the flow rate, is sent, and is supplied to the first flow path 15 via the first connection portion 12.

気体Ｇｆは、特に限定されないが、例えば、空気、窒素、酸素、アルゴンであり、特に、乾燥空気や乾燥窒素を用いることができる。気体Ｇｆは圧縮、加圧（例えば、３気圧から７気圧）され第２接続部１３を介して第２流路１６に供給される。 The gas Gf is not particularly limited, but is, for example, air, nitrogen, oxygen, or argon, and in particular, dry air or dry nitrogen can be used. The gas Gf is compressed and pressurized (for example, 3 to 7 atm) and supplied to the second flow path 16 via the second connection portion 13.

図２は、本発明の一実施形態に係るノズルの断面図である。図２を参照するに、ノズル１８の内部には、第１流路１５を有する管体１４の先端１４ｃが配置される。さらに、ノズル１８の内部には、ケーシング１１の内壁面である大径面１１ａと管体１４の外面である小径面１４ｂとによって形成された第２流路１６の出口が配置される。 FIG. 2 is a cross-sectional view of a nozzle according to an embodiment of the present invention. With reference to FIG. 2, the tip 14c of the tube body 14 having the first flow path 15 is arranged inside the nozzle 18. Further, inside the nozzle 18, an outlet of a second flow path 16 formed by a large diameter surface 11a which is an inner wall surface of the casing 11 and a small diameter surface 14b which is an outer surface of the pipe body 14 is arranged.

第２流路１６は、その流路面積が管体１４の先端１４ｃに向けて漸次縮小されるように構成される。これにより、第２流路１６を流れる気体Ｇｆは線速度が増加して出口１６ａから噴射されることで、気体Ｇｆが噴霧液Ｌｆに高速度で衝突することで噴霧液Ｌｆの微細液滴化が促進されるとともに、噴霧液Ｌｆの内容物がノズル１８の噴射口１９付近に付着し難くなり、目詰まりし難くなる。 The second flow path 16 is configured such that the flow path area is gradually reduced toward the tip 14c of the tubular body 14. As a result, the gas Gf flowing through the second flow path 16 has an increased linear velocity and is ejected from the outlet 16a, so that the gas Gf collides with the spray liquid Lf at a high speed to form fine droplets of the spray liquid Lf. Is promoted, and the contents of the spray liquid Lf are less likely to adhere to the vicinity of the injection port 19 of the nozzle 18, making it less likely to be clogged.

第２流路１６の大径面１１ａは管体１４の先端１４ｃに向けて次第に管体１４の中心軸Ｘに向かって前進するように形成してもよい。このような構成により、管体１４の先端１４ｃと噴射口１９との間の空間において、出口１６ａから噴出した気体Ｇｆが管体１４の中心軸Ｘ方向に流れることで管体１４の先端１４ｃの開口から第１流路１５の内部に気体Ｇｆがより多く侵入できるようになるので、第１流路１５から噴出される噴霧液Ｌｆと気体Ｇｆとがより混合して、噴霧液Ｌｆがより微細液滴化される。なお、大径面１１ａは、噴射口１９に向かう形状は、中心軸Ｘ方向に沿った断面を、直線状に形成することができる。 The large-diameter surface 11a of the second flow path 16 may be formed so as to gradually advance toward the tip 14c of the tube 14 toward the central axis X of the tube 14. With such a configuration, in the space between the tip 14c of the tube 14 and the injection port 19, the gas Gf ejected from the outlet 16a flows in the direction of the central axis X of the tube 14, so that the tip 14c of the tube 14 Since more gas Gf can enter the inside of the first flow path 15 from the opening, the spray liquid Lf and the gas Gf ejected from the first flow path 15 are more mixed, and the spray liquid Lf becomes finer. It is made into droplets. The large-diameter surface 11a has a shape toward the injection port 19 so that the cross section along the central axis X direction can be formed in a straight line.

さらに、第２流路１６は、その流路面積が出口１６ａにおいて最小となることが好ましい。これにより、第２流路１６の出口１６ａから噴出する気体Ｇｆの線速度を最大化して管体１４の先端１４ｃの開口から第１流路１５の内部に気体Ｇｆがより深く侵入できるようになるので噴霧液Ｌｆの微細液滴化がさらに促進される。 Further, it is preferable that the flow path area of the second flow path 16 is the minimum at the outlet 16a. As a result, the linear velocity of the gas Gf ejected from the outlet 16a of the second flow path 16 is maximized so that the gas Gf can penetrate deeper into the inside of the first flow path 15 through the opening of the tip 14c of the tubular body 14. Therefore, the atomization of the spray liquid Lf into fine droplets is further promoted.

第２流路１６は、その出口１６ａにおいて、小径面１４ｂと大径面１１ａとの距離が最小となるように構成されることが好ましい。これにより、第２流路１６の流路面積を最小化できる。出口１６ａにおいて、小径面１４ｂと大径面１１ａとの距離は、スプレー１０を使用する際の最大気体流量と気体供給圧力に応じて適宜選択されるが、ノズル１８の目詰まりを低減できる点で、０．０１ｍｍ〜０．２０ｍｍであることが好ましい。 The second flow path 16 is preferably configured so that the distance between the small diameter surface 14b and the large diameter surface 11a is minimized at the outlet 16a. As a result, the flow path area of the second flow path 16 can be minimized. At the outlet 16a, the distance between the small diameter surface 14b and the large diameter surface 11a is appropriately selected according to the maximum gas flow rate and gas supply pressure when the spray 10 is used, but the clogging of the nozzle 18 can be reduced. , 0.01 mm to 0.20 mm is preferable.

なお、管体１４の先端１４ｃの形状は、中心軸Ｘに沿った断面が、図２に示す矩形に加えて、鋭角形状、円形、楕円形およびこれらを組み合わせた形状のいずれでもよい。 The shape of the tip 14c of the tubular body 14 may be any of an acute-angled shape, a circular shape, an elliptical shape, and a combination thereof in addition to the rectangular shape shown in FIG. 2 in the cross section along the central axis X.

噴射口１９は、その開口径Ｄ１が、管体１４の先端１４ｃの開口径Ｄ２よりも小さく構成される。これにより、管体１４の先端１４ｃの開口と噴射口１９との間において、噴霧液Ｌｆが気体Ｇｆと十分に混合され、噴霧液Ｌｆが微細液滴化される。 The opening diameter D1 of the injection port 19 is smaller than the opening diameter D2 of the tip 14c of the tubular body 14. As a result, the spray liquid Lf is sufficiently mixed with the gas Gf between the opening of the tip 14c of the tubular body 14 and the injection port 19, and the spray liquid Lf is made into fine droplets.

ノズル１８は、噴射口１９の内部において、その内面１８ａが第２流路１６の大径面１１ａと連続して形成され、噴射方向に向かってその内径が漸次縮径するように構成されることが好ましい。 The inner surface 18a of the nozzle 18 is formed continuously with the large diameter surface 11a of the second flow path 16 inside the injection port 19, and the inner diameter of the nozzle 18 is gradually reduced toward the injection direction. Is preferable.

ノズル１８は、噴射口１９の外部において、その内面１８ｂは、噴射方向に向かってその内径が漸次拡径するように構成されることが好ましい。これにより、噴射流の広がりを所望の範囲に制御可能になる。 It is preferable that the inner surface 18b of the nozzle 18 is configured such that the inner diameter of the nozzle 18 gradually increases in the injection direction outside the injection port 19. This makes it possible to control the spread of the jet flow within a desired range.

本実施形態に係るノズル１８は、使用の際、すなわち噴霧液の噴射の際に、管体１４の先端１４ｃが少なくとも径方向（中心軸Ｘに対して垂直方向）に振動するように構成してもよい。その例を以下に説明する。 The nozzle 18 according to the present embodiment is configured so that the tip 14c of the tubular body 14 vibrates at least in the radial direction (perpendicular to the central axis X) during use, that is, when the spray liquid is sprayed. May be good. An example will be described below.

図３は、本発明の一実施形態に係るノズルの噴霧液を噴射する際の管体の先端の動きを示す図である。図３（ａ）および（ｂ）は、噴霧液Ｌｆおよび気体Ｇｆを紙面左側から右側に噴射するノズルを高速度ビデオカメラで１μ秒毎に撮影したビデオの連続したフレームを示す。図３（ａ）を参照するに、第２流路の出口１６ａにおいて、紙面上側の大径面１１ａと小径面１４ｂとの距離が、紙面下側の大径面１１ａと小径面１４ｂとの距離よりも大きくなっていることが分かる。図３（ｂ）を参照するに、図３（ａ）から１μ秒後には、紙面下側の大径面１１ａと小径面と１４ｂとの距離が、紙面上側の大径面１１ａと小径面１４ｂとの距離よりも大きくなっていることが分かる。このことから、管体の先端１４ｃが少なくとも上下に振動していることが分かる。これにより、第２流路の出口１６ａにおいて、大径面１１ａと小径面１４ｂとの距離、すなわち出口１６ａの開口の大きさが周方向に亘って高速度で変化することで気体Ｇｆの噴射の線速度が変化する。これにより、気体Ｇｆの噴射の線速度が周方向に亘って部分的に高まることで、液体Ｌｆの内容物が、第２流路の出口１６ａやノズル１８の噴射口１９付近に付着したとしても容易に除去することができる。これにより、より目詰まりし難いノズル１８を提供できる。 FIG. 3 is a diagram showing the movement of the tip of the tube when injecting the spray liquid of the nozzle according to the embodiment of the present invention. 3 (a) and 3 (b) show continuous frames of video taken every 1 μs with a high-speed video camera at a nozzle that injects spray liquid Lf and gas Gf from the left side to the right side of the paper surface. With reference to FIG. 3A, at the outlet 16a of the second flow path, the distance between the large-diameter surface 11a on the upper side of the paper surface and the small-diameter surface 14b is the distance between the large-diameter surface 11a on the lower side of the paper surface and the small-diameter surface 14b. It can be seen that it is larger than. With reference to FIG. 3B, after 1 μsec from FIG. 3A, the distance between the large-diameter surface 11a on the lower side of the paper surface and the small-diameter surface and 14b is increased between the large-diameter surface 11a and the small-diameter surface 14b on the upper side of the paper surface. It can be seen that it is larger than the distance to. From this, it can be seen that the tip 14c of the tube body vibrates at least up and down. As a result, at the outlet 16a of the second flow path, the distance between the large-diameter surface 11a and the small-diameter surface 14b, that is, the size of the opening of the outlet 16a changes at a high speed in the circumferential direction, so that the gas Gf is injected. The linear velocity changes. As a result, the linear velocity of the gas Gf injection is partially increased in the circumferential direction, so that even if the contents of the liquid Lf adhere to the outlet 16a of the second flow path or the vicinity of the injection port 19 of the nozzle 18. It can be easily removed. This makes it possible to provide the nozzle 18 which is less likely to be clogged.

管体１４の先端１４ｃの振動を生じさせるためには、管体１４が弾性体で形成されていてもよく、管体１４の後端の支持部が弾性体で形成されていてもよい。 In order to generate the vibration of the tip 14c of the tube 14, the tube 14 may be formed of an elastic body, or the support portion at the rear end of the tube 14 may be formed of an elastic body.

なお、この例では、第２流路の出口１６ａにおける大径面１１ａと小径面１４ｂとの距離（隙間）が設計では約０．０２０ｍｍであり、図３（ａ）および（ｂ）の振幅は、約０．０１３ｍｍであるので、図３（ａ）および（ｂ）では、隙間が狭い方は０．００７ｍｍ程度になっており、広い方は０．０３３ｍｍ程度になっている。 In this example, the distance (gap) between the large-diameter surface 11a and the small-diameter surface 14b at the outlet 16a of the second flow path is about 0.020 mm in the design, and the amplitudes of FIGS. 3A and 3B are Since it is about 0.013 mm, in FIGS. 3 (a) and 3 (b), the narrow gap is about 0.007 mm and the wide gap is about 0.033 mm.

本実施形態のスプレー１０のノズル１８は、噴霧液Ｌｆを供給する第１流路１５を有する管体１４を囲む気体供給用の第２流路１６がその流路面積が管体１４の先端１４ｃに向けて漸次縮小されているので、第２流路１６を流れる気体Ｇｆの線速度が増加して出口１６ａから噴射される。これにより、線速度が増加した気体Ｇｆが噴霧液Ｌｆに衝突することで噴霧液Ｌｆの微細液滴化が促進されるとともに、液体Ｌｆの内容物がノズル１８の噴射口１９付近に付着し難くなり目詰まりが生じ難くなる。さらに、ノズル１８は、管体１４の先端１４ｃに対して離隔して設けられた噴射口１９の開口径Ｄ１が管体１４の先端１４ｃの開口径Ｄ２よりも小さいので、噴霧液Ｌｆと気体Ｇｆとがより混合し易くなり、噴霧液Ｌｆの微細液滴化が促進される。したがって、噴霧液Ｌｆの微細液滴化が可能で目詰まりが生じ難いノズル１８を提供できる。 In the nozzle 18 of the spray 10 of the present embodiment, the second flow path 16 for gas supply surrounding the tube body 14 having the first flow path 15 for supplying the spray liquid Lf has a flow path area of the tip 14c of the tube body 14. Since the gas Gf is gradually reduced toward, the linear velocity of the gas Gf flowing through the second flow path 16 increases and the gas is injected from the outlet 16a. As a result, the gas Gf whose linear velocity has increased collides with the spray liquid Lf to promote the formation of fine droplets of the spray liquid Lf, and the contents of the liquid Lf are less likely to adhere to the vicinity of the injection port 19 of the nozzle 18. It is less likely to cause clogging. Further, since the opening diameter D1 of the injection port 19 provided apart from the tip 14c of the tubular body 14 of the nozzle 18 is smaller than the opening diameter D2 of the tip 14c of the tubular body 14, the spray liquid Lf and the gas Gf Is easier to mix with, and the atomization of the spray liquid Lf is promoted. Therefore, it is possible to provide the nozzle 18 which can make the spray liquid Lf into fine droplets and is less likely to cause clogging.

さらに、本実施形態のスプレー１０は、噴霧液Ｌｆの微細液滴化が可能で、目詰まりが生じ難いノズルを備えるスプレーを提供できる。 Further, the spray 10 of the present embodiment can provide a spray having a nozzle capable of forming fine droplets of the spray liquid Lf and less likely to cause clogging.

以下、本発明の一実施形態に係るノズルの変形例を説明する。変形例は、上述した図２のノズルと異なる構成について説明し、同様の構成について図２と同じ符号を付してその説明を省略する。また、説明を省略した同様の構成から奏される効果は同様である。記載を簡便にするためその効果の説明を省略する。 Hereinafter, a modified example of the nozzle according to the embodiment of the present invention will be described. The modified example describes a configuration different from that of the nozzle of FIG. 2 described above, and the same reference numerals are given to the same configuration with the same reference numerals as those of FIG. Further, the effects produced from the same configuration in which the description is omitted are the same. The description of the effect will be omitted for the sake of simplicity.

図４は、本発明の一実施形態に係るノズルの変形例（変形例１）の断面図である。図４を参照するに、変形例１のノズル１１８は、管体１１４がその先端１１４ｃに向かって内面１１４ａが拡径するように次第に肉薄に形成されてなる。ノズル１１８は、この点以外は、図２の本実施形態に係るノズル１８と同様の構成を有する。これにより、第２流路１６の出口１６ａから噴出した気体Ｇｆが、管体１１４の先端１１４ｃの開口から第１流路１５に侵入し易くなることで、第１流路１５から噴出される噴霧液Ｌｆの微細液滴化をいっそう促進できる。なお、図示は省略するが、管体１１４がその先端１１４ｃに向かって外面、つまり小径面１４ｂが縮径するように次第に肉薄に形成されてもよい。 FIG. 4 is a cross-sectional view of a modified example (modified example 1) of the nozzle according to the embodiment of the present invention. With reference to FIG. 4, the nozzle 118 of the first modification is formed so that the tubular body 114 is gradually thinned so that the inner surface 114a expands in diameter toward the tip 114c. Except for this point, the nozzle 118 has the same configuration as the nozzle 18 according to the present embodiment of FIG. As a result, the gas Gf ejected from the outlet 16a of the second flow path 16 can easily enter the first flow path 15 through the opening of the tip 114c of the tubular body 114, so that the spray ejected from the first flow path 15 The formation of fine droplets of the liquid Lf can be further promoted. Although not shown, the tubular body 114 may be formed to be gradually thinner toward the tip 114c so that the outer surface, that is, the small diameter surface 14b is reduced in diameter.

図５は、本発明の一実施形態に係るノズルの変形例（変形例２）の断面図である。図５を参照するに、変形例２のノズル２１８は、管体２１４の外面を形成している第２流路１６の小径面２１４ｂが、先端２１４ｃに向けて次第に大径面１１ａに接近するように拡径されると共に、管体２１４の内面２１４ａも拡径されて形成される。ノズル２１８は、この点以外は、図２の本実施形態に係るノズル１８と同様の構成を有する。これにより、第２流路１６の出口１６ａから噴出した気体Ｇｆが、管体２１４の先端２１４ｃの開口から第１流路１５に侵入し易くなることで、第１流路１５から噴出される噴霧液Ｌｆの微細液滴化をいっそう促進できる。なお、管体２１４の内面２１４ａの中心軸Ｘに沿った断面形状は、図５に示す末広がりの形状であればよく、例えば、ホーン形状あるいはベル形状でもよい。 FIG. 5 is a cross-sectional view of a modified example (modified example 2) of the nozzle according to the embodiment of the present invention. With reference to FIG. 5, in the nozzle 218 of the modified example 2, the small diameter surface 214b of the second flow path 16 forming the outer surface of the pipe body 214 gradually approaches the large diameter surface 11a toward the tip 214c. The diameter of the inner surface 214a of the pipe body 214 is also expanded and formed. Except for this point, the nozzle 218 has the same configuration as the nozzle 18 according to the present embodiment of FIG. As a result, the gas Gf ejected from the outlet 16a of the second flow path 16 can easily enter the first flow path 15 through the opening of the tip 214c of the tubular body 214, so that the spray ejected from the first flow path 15 The formation of fine droplets of the liquid Lf can be further promoted. The cross-sectional shape of the inner surface 214a of the tubular body 214 along the central axis X may be any shape as shown in FIG. 5, and may be, for example, a horn shape or a bell shape.

図６は、本発明の一実施形態に係るノズルの変形例（変形例３）の断面図である。図６を参照するに、変形例３のノズル３１８は、第２流路１６の大径面３１１ａから噴射口１９に向かうノズル３１８の内面３１８ａの形状が、中心軸Ｘ方向に沿った断面において、ノズル３１８の内部に向かって凹の二次関数形状である。ノズル３１８の内部においてこの点以外は、図５の変形例２のノズル２１８と同様の構成を有する。これにより、第２流路１６を流れ、出口１６ａから噴出する気体Ｇｆが管体２１４の中心軸Ｘ方向に流れることで管体２１４の先端２１４ｃの開口から第１流路１５の内部に気体Ｇｆがより多く侵入できるようになるので、第１流路１５から噴出される噴霧液Ｌｆの微細液滴化をいっそう促進できる。なお、内面３１８ａの断面形状は、二次関数形状に限定されず、凹状であればより高次の関数形状でもよい。 FIG. 6 is a cross-sectional view of a modified example (modified example 3) of the nozzle according to the embodiment of the present invention. With reference to FIG. 6, in the nozzle 318 of the modification 3, the shape of the inner surface 318a of the nozzle 318 from the large diameter surface 311a of the second flow path 16 toward the injection port 19 is a cross section along the central axis X direction. It has a quadratic function shape that is concave toward the inside of the nozzle 318. The inside of the nozzle 318 has the same configuration as the nozzle 218 of the second modification of FIG. 5 except for this point. As a result, the gas Gf flowing through the second flow path 16 and ejected from the outlet 16a flows in the direction of the central axis X of the pipe body 214, so that the gas Gf flows into the inside of the first flow path 15 from the opening of the tip 214c of the pipe body 214. Can penetrate more, so that the atomization of the spray liquid Lf ejected from the first flow path 15 can be further promoted. The cross-sectional shape of the inner surface 318a is not limited to the quadratic function shape, and may be a higher-order function shape as long as it is concave.

ノズル３１８は、噴射口１９の開口位置から外側の内面３１８ｂの口径が噴射方向に沿って漸次拡径するように形成されており、内面３１８ｂは中心軸Ｘ方向に沿った断面が、中心軸Ｘに向かって凹形状に形成される。これにより、噴射された微細液滴の噴霧流の方向性を制御し易くなり、また、噴射口１９から噴射直後に噴霧流が広げることができ、微細液滴同士の衝突によって液滴が成長することを抑制できる。 The nozzle 318 is formed so that the diameter of the inner surface 318b on the outer side from the opening position of the injection port 19 gradually increases along the injection direction, and the inner surface 318b has a cross section along the central axis X direction. It is formed in a concave shape toward. This makes it easier to control the direction of the spray flow of the injected fine droplets, and the spray flow can be expanded immediately after injection from the injection port 19, and the droplets grow due to collision between the fine droplets. Can be suppressed.

図７は、本発明の一実施形態に係るノズルの変形例（変形例４）の断面図である。図７を参照するに、変形例４のノズル４１８は、第２流路１６の大径面４１１ａから噴射口１９に向かうノズル４１８の内面４１８ａの形状が、中心軸Ｘ方向に沿った断面において、ノズル４１８の内部に向かって凸の二次関数形状である。ノズル４１８の内部においてこの点以外は、図５の変形例２のノズル２１８と同様の構成を有する。これにより、第２流路１６を流れ、出口１６ａから噴出する気体Ｇｆが管体２１４の中心軸Ｘ方向に流れることで管体２１４の先端２１４ｃの開口から第１流路１５の内部に気体Ｇｆがより多く侵入でき、さらに、ノズル４１８の内面４１８ａに衝突した微細液滴が出口１６ａから噴出する気体Ｇｆと混ざり易くなるので、噴射口１９から噴出される噴霧液Ｌｆの微細液滴化をいっそう促進できる。なお、内面４１８ａの断面形状は、二次関数形状に限定されず、凸状であればより高次の関数形状でもよい。 FIG. 7 is a cross-sectional view of a modified example (modified example 4) of the nozzle according to the embodiment of the present invention. With reference to FIG. 7, the nozzle 418 of the modified example 4 has a cross section in which the shape of the inner surface 418a of the nozzle 418 from the large diameter surface 411a of the second flow path 16 toward the injection port 19 is along the central axis X direction. It has a quadratic function shape that is convex toward the inside of the nozzle 418. The inside of the nozzle 418 has the same configuration as the nozzle 218 of the second modification of FIG. 5 except for this point. As a result, the gas Gf flowing through the second flow path 16 and ejected from the outlet 16a flows in the direction of the central axis X of the tube body 214, so that the gas Gf flows into the inside of the first flow path 15 from the opening of the tip 214c of the tube body 214. In addition, the fine droplets colliding with the inner surface 418a of the nozzle 418 are more likely to be mixed with the gas Gf ejected from the outlet 16a, so that the spray liquid Lf ejected from the injection port 19 is further made into fine droplets. Can be promoted. The cross-sectional shape of the inner surface 418a is not limited to the quadratic function shape, and may be a higher-order function shape as long as it is convex.

ノズル４１８は、噴射口１９の開口位置から外側の内面４１８ｂの口径が噴射方向に沿って漸次拡径するように形成されており、内面４１８ｂは中心軸Ｘ方向に沿った断面が、中心軸Ｘに向かって凸形状に形成される。これにより、噴射された微細液滴が内面４１８ｂに付着し難くなり、目詰まりを抑制できる。また微細液滴の噴霧流をホーン形状に広げることができる。 The nozzle 418 is formed so that the diameter of the outer inner surface 418b gradually increases along the injection direction from the opening position of the injection port 19, and the inner surface 418b has a cross section along the central axis X direction. It is formed in a convex shape toward. As a result, the ejected fine droplets are less likely to adhere to the inner surface 418b, and clogging can be suppressed. In addition, the spray flow of fine droplets can be spread in the shape of a horn.

図８は、本発明の一実施形態に係るノズルの変形例（変形例５）の断面図である。図８を参照するに、変形例５のノズル５１８は、噴射口５１９の開口端５１９ａが管体１４の先端に向かって突出しており、第２流路１６の大径面５１１ａから開口端５１９ａに向かうノズル５１８の内面５１８ａの形状が、中心軸Ｘ方向に沿った断面において、ノズル３１８の内部に向かって凹状の形状を有する。ノズル５１８は、この点以外は、図２の本実施形態に係るノズル１８と同様の構成を有する。 FIG. 8 is a cross-sectional view of a modified example (modified 5) of the nozzle according to the embodiment of the present invention. Referring to FIG. 8, in the nozzle 518 of the modified example 5, the opening end 519a of the injection port 519 protrudes toward the tip of the tubular body 14, and the large-diameter surface 511a of the second flow path 16 extends to the opening end 519a. The shape of the inner surface 518a of the nozzle 518 facing the nozzle has a concave shape toward the inside of the nozzle 318 in a cross section along the central axis X direction. The nozzle 518 has the same configuration as the nozzle 18 according to the present embodiment of FIG. 2 except for this point.

これにより、第２流路１６を流れ、出口１６ａから噴出する気体Ｇｆの一部がノズル５１８の内面５１８ａから突出する開口端５１９ａに沿って流れ、管体１４の先端１４ｃの開口から第１流路１５の内部に気体Ｇｆがより多く侵入できるので、噴霧液Ｌｆといっそう混ざり合って噴霧液Ｌｆの微細液滴化をいっそう促進できる。 As a result, a part of the gas Gf that flows through the second flow path 16 and is ejected from the outlet 16a flows along the opening end 519a protruding from the inner surface 518a of the nozzle 518, and flows from the opening of the tip 14c of the tubular body 14 to the first flow. Since more gas Gf can penetrate into the inside of the path 15, it can be more mixed with the spray liquid Lf to further promote the formation of fine droplets of the spray liquid Lf.

なお、噴射口５１９の開口端５１９ａは、上述した変形例１〜４のノズル１１８、２１８、３１８および４１８に適用できる。これにより、変形例５と同様の効果が得られる。 The opening end 519a of the injection port 519 can be applied to the nozzles 118, 218, 318 and 418 of the above-described modifications 1 to 4. As a result, the same effect as that of the modified example 5 can be obtained.

［実施例］
実施例として、図２に示した本実施形態に係るノズル１８を備える図１に示した本実施形態に係るスプレー１０を用いて噴射試験を行った。噴霧液の第２流路１５を有する管体１４は内径０．３ｍｍの石英ガラス製を用い、ケーシング１１はホウケイ酸ガラス管を加工したものである。噴射口１９の開口径は０．２ｍｍとした。第２流路１６の出口１６ａの大径面１１ａと小径面１４ｂとの距離（隙間）は０．０２０ｍｍとした。噴霧液は水の重量に対して濃度が５重量％の米粉分散液を使用した。[Example]
As an example, an injection test was conducted using the spray 10 according to the present embodiment shown in FIG. 1 including the nozzle 18 according to the present embodiment shown in FIG. The tube body 14 having the second flow path 15 of the spray liquid is made of quartz glass having an inner diameter of 0.3 mm, and the casing 11 is a processed borosilicate glass tube. The opening diameter of the injection port 19 was set to 0.2 mm. The distance (gap) between the large-diameter surface 11a and the small-diameter surface 14b of the outlet 16a of the second flow path 16 is 0.020 mm. As the spray liquid, a rice flour dispersion having a concentration of 5% by weight with respect to the weight of water was used.

図９は、本発明の一実施例に使用した噴霧液の特性を示す図である。図９を参照するに、米粉分散液の粒度分布は、０．５μｍから３５０μｍまで測定可能なレーザ回折式粒度分布測定装置によってスターラーで撹拌しながら測定した粒度分布である。Ｄ５０（体積メディアン径）は３８．５μｍ、Ｄ９０（体積90％径）は９６．６μｍ、Ｄ３２ザウター平均径（体表面積平均）は１６．７μｍであった。FIG. 9 is a diagram showing the characteristics of the spray liquid used in one embodiment of the present invention. With reference to FIG. 9, the particle size distribution of the rice flour dispersion is a particle size distribution measured while stirring with a stirrer using a laser diffraction type particle size distribution measuring device capable of measuring from 0.5 μm to 350 μm. The D 50 (volume median diameter) was 38.5 μm, the D 90 (volume 90% diameter) was 96.6 μm, and the D 32 Sauter average diameter (body surface area average) was 16.7 μm.

この米粉分散液をスプレーに毎分１０ｍＬで供給し、気体として窒素ガスを圧力７気圧で毎分１．７Ｌで供給して、連続噴射実験を行った。その結果、４時間経過後も目詰まりが生じず正常に噴射できた。 This rice flour dispersion was supplied to the spray at 10 mL / min, and nitrogen gas was supplied as a gas at a pressure of 7 atm at 1.7 L / min to carry out a continuous injection experiment. As a result, clogging did not occur even after 4 hours had passed, and normal injection was possible.

以上、本発明の好ましい実施形態について詳述したが、本発明は係る特定の実施形態に限定されるものではなく、請求の範囲に記載された本発明の範囲内において、種々の変形・変更が可能である。例えば、実施形態に係るノズルと変形例１〜５のノズルの構成を互いに組み合わせてもよい。 Although the preferred embodiment of the present invention has been described in detail above, the present invention is not limited to the specific embodiment, and various modifications and changes can be made within the scope of the present invention described in the claims. It is possible. For example, the configurations of the nozzle according to the embodiment and the nozzles of the modified examples 1 to 5 may be combined with each other.

また、本発明の好ましい実施形態に係るノズルおよびスプレーは、噴霧乾燥、スプレー塗布、スプレー焼結、スプレー滅菌、スプレー加湿、スプレー冷却、薬剤散布および化学分析のための試料導入、薬液塗布、粒子化、イオン化等の幅広い用途に用いることができる。 Further, the nozzle and spray according to the preferred embodiment of the present invention include spray drying, spray coating, spray sintering, spray sterilization, spray humidification, spray cooling, sample introduction for chemical spraying and chemical analysis, chemical coating, and particle formation. , Can be used for a wide range of applications such as ionization.

なお、以上の説明に関してさらに実施形態として以下の付記を開示する。
（付記１） スプレー用のノズルであって、
噴霧液供給用の第１の流路を有する管体と、
前記管体を囲む、気体供給用の第２の流路であって、該第２の流路は、その流路面積が、前記管体の先端に向けて漸次縮小されてなる、該第２の流路と、
前記管体の先端に対して離隔して設けられ、前記噴霧液の微細液滴を噴射する噴射口であって、前記噴射口の開口径は、前記管体の先端の開口径よりも小さい、該噴射口と、
を備える、前記ノズル。
（付記２） 前記管体は弾性体からなり、前記先端が少なくとも径方向に振動可能であるように構成される、付記１記載のノズル。
（付記３） 前記管体の先端は、前記第２の流路の出口からの気体の噴出によって少なくとも径方向に振動可能であるように構成される、付記１記載のノズル。
（付記４） 前記第２の流路は、その出口において流路面積が最小となる、付記１〜３のうちいずれか一項記載のノズル。
（付記５） 前記管体は、その内径が先端に向かって拡径するように次第に肉薄に形成されてなる、付記１〜４のうちいずれか一項記載のノズル。
（付記６） 前記第２の流路は、大径面および小径面によって形成され、該大径面が前記噴射口に向かって次第に前記管体の中心軸方向に前進する、付記１〜５のうちいずれか一項記載のノズル。
（付記７） 前記大径面が前記噴射口に向かう形状は、前記中心軸方向に沿った断面が、直線状、または当該ノズルの内部に向かって凹または凸の二次関数形状である、付記６記載のノズル。
（付記８） 前記小径面は、前記管体の外面であり、該管体の中心軸と平行である、付記６または７記載のノズル。
（付記９） 前記小径面は、前記管体の外面であり、前記管体の先端に向けて次第に前記大径面に接近するように拡径されると共に、該管体の内面は拡径される、付記６記載のノズル。
（付記１０） 前記大径面に連続する前記噴射口の開口端が、前記管体の先端に向かって突出する、付記６〜９のうち、いずれか一項記載のノズル。
（付記１１） 前記第２の流路は、その出口において、前記大径面と前記小径面との距離が０．０１ｍｍ〜０．２０ｍｍである、付記６〜１０のうち、いずれか一項記載のノズル。
（付記１２） 前記第１の流路と第２の流路とは、共通の中心軸を有する、付記１〜１１のうちいずれか一項記載のノズル。
（付記１３） 前記噴射口は、開口位置から外側の内面の口径が噴射方向に沿って漸次拡径するように形成されてなる、付記１〜１２のうち、いずれか一項記載のノズル。
（付記１４） 前記噴射口は、開口位置から外側の内面は、前記中心軸方向に沿った断面が、該中心軸に向かって凹または凸形状に形成されてなる、付記１３記載のノズル。
（付記１５） 前記噴霧液は、溶解液、分散液、ゲル状物質を含む液、またはエマルションである、付記１〜１４のうちいずれか一項記載のノズル。
（付記１６） 噴霧液の供給源と接続可能な第１の流路の後端部に連通する第１の接続部と、
気体の供給源と接続可能な第２の流路の後端部に連通する第２の接続部と、
付記１〜１５のうちいずれか一項記載のノズルと、
を備えるスプレー。
（付記１７） 前記気体および噴霧液は加圧されて供給される、付記１６記載のスプレー。
（付記１８） 前記気体は加熱されて供給される、付記１６または１７記載のスプレー。
（付記１９） 前記噴霧液は、溶解液、分散液、ゲル状物質含む液、またはエマルションである、付記１６〜１８のうちいずれか一項記載のスプレー。Regarding the above description, the following additional notes will be further disclosed as an embodiment.
(Appendix 1) A nozzle for spraying
A tube body having a first flow path for supplying a spray liquid and
A second flow path for gas supply that surrounds the tube body, wherein the flow path area of the second flow path is gradually reduced toward the tip of the tube body. Flow path and
It is an injection port provided at a distance from the tip of the tube and ejects fine droplets of the spray liquid, and the opening diameter of the injection port is smaller than the opening diameter of the tip of the tube. With the injection port
The nozzle comprising.
(Supplementary note 2) The nozzle according to Supplementary note 1, wherein the tubular body is made of an elastic body, and the tip thereof is configured to be vibrable at least in the radial direction.
(Supplementary Note 3) The nozzle according to Supplementary Note 1, wherein the tip of the tubular body is configured to be vibrable at least in the radial direction by ejecting gas from the outlet of the second flow path.
(Supplementary note 4) The nozzle according to any one of Supplementary note 1 to 3, wherein the second flow path has a minimum flow path area at its outlet.
(Supplementary Note 5) The nozzle according to any one of Supplementary note 1 to 4, wherein the tubular body is gradually formed to be thin so that its inner diameter increases toward the tip end.
(Appendix 6) The second flow path is formed by a large-diameter surface and a small-diameter surface, and the large-diameter surface gradually advances toward the injection port in the central axis direction of the pipe body. The nozzle described in any one of them.
(Appendix 7) The shape of the large-diameter surface toward the injection port is a quadratic function shape in which the cross section along the central axis direction is linear or concave or convex toward the inside of the nozzle. Nozzle according to 6.
(Supplementary note 8) The nozzle according to Supplementary note 6 or 7, wherein the small diameter surface is an outer surface of the tubular body and is parallel to the central axis of the tubular body.
(Appendix 9) The small diameter surface is the outer surface of the pipe body, and the diameter is gradually increased toward the tip of the pipe body so as to gradually approach the large diameter surface, and the inner surface of the pipe body is expanded in diameter. The nozzle according to Appendix 6.
(Supplementary Note 10) The nozzle according to any one of Supplementary note 6 to 9, wherein the open end of the injection port continuous with the large-diameter surface projects toward the tip of the tubular body.
(Appendix 11) The second flow path has a distance between the large-diameter surface and the small-diameter surface of 0.01 mm to 0.20 mm at its outlet, according to any one of the appendices 6 to 10. Nozzle.
(Supplementary Note 12) The nozzle according to any one of Supplementary note 1 to 11, wherein the first flow path and the second flow path have a common central axis.
(Supplementary Note 13) The nozzle according to any one of Supplementary note 1 to 12, wherein the injection port is formed so that the diameter of the inner surface outside from the opening position gradually increases along the injection direction.
(Supplementary Note 14) The nozzle according to Supplementary Note 13, wherein the injection port has a cross section formed in a concave or convex shape along the central axis on the inner surface outside from the opening position.
(Supplementary note 15) The nozzle according to any one of Supplementary note 1 to 14, wherein the spray liquid is a dissolution liquid, a dispersion liquid, a liquid containing a gel-like substance, or an emulsion.
(Appendix 16) A first connection portion communicating with the rear end portion of the first flow path that can connect to the spray liquid supply source, and
A second connection that communicates with the rear end of the second flow path that can connect to the gas source,
The nozzle according to any one of Appendix 1 to 15 and
With a spray.
(Supplementary note 17) The spray according to Supplementary note 16, wherein the gas and the spray liquid are supplied under pressure.
(Appendix 18) The spray according to Appendix 16 or 17, wherein the gas is heated and supplied.
(Supplementary note 19) The spray according to any one of Supplementary note 16 to 18, wherein the spray solution is a solution, a dispersion solution, a solution containing a gel-like substance, or an emulsion.

１０ スプレー
１１ ケーシング
１１ａ、４１１ａ、５１１ａ 大径面
１２ 第１接続部
１３ 第２接続部
１４、１１４、２１４ 管体
１４ｂ、２１４ｂ 小径面
１４ｃ、２１４ｃ 管体の先端
１５ 第１流路
１６ 第２流路
１６ａ 第２流路の出口
１８、１１８、２１８、３１８、４１８、５１８ ノズル
１９ 噴射口

10 Spray 11 Casing 11a, 411a, 511a Large diameter surface 12 First connection part 13 Second connection part 14, 114, 214 Tube body 14b, 214b Small diameter surface 14c, 214c Tip of tube body 15 First flow path 16 Second flow Road 16a Second flow path outlet 18, 118, 218, 318, 418, 518 Nozzle 19 Injection port

Claims (14)

スプレー用のノズルであって、
噴霧液供給用の第１の流路を有する管体と、
前記管体を囲む、気体供給用の第２の流路であって、該第２の流路は、その流路面積が、前記管体の先端に向けて漸次縮小されてなる、該第２の流路と、
前記管体の先端に対して離隔して設けられ、前記噴霧液の微細液滴を噴射する噴射口であって、前記噴射口の開口径は、前記管体の先端の開口径よりも小さい、該噴射口と、
を備える、前記ノズル。A nozzle for spraying
A tube body having a first flow path for supplying a spray liquid and
A second flow path for gas supply that surrounds the tube body, wherein the flow path area of the second flow path is gradually reduced toward the tip of the tube body. Flow path and
It is an injection port provided at a distance from the tip of the tube and ejects fine droplets of the spray liquid, and the opening diameter of the injection port is smaller than the opening diameter of the tip of the tube. With the injection port
The nozzle comprising. 前記管体は弾性体からなり、前記管体の先端が少なくとも径方向に振動可能であるように構成される、請求項１記載のノズル。 The nozzle according to claim 1, wherein the tubular body is made of an elastic body, and the tip of the tubular body is configured to be vibrable at least in the radial direction. 前記管体の先端は、前記第２の流路の出口からの気体の噴出によって少なくとも径方向に振動可能であるように構成される、請求項１記載のノズル。 The nozzle according to claim 1, wherein the tip of the tubular body is configured to be vibrable at least in the radial direction by ejecting gas from the outlet of the second flow path. 前記第２の流路は、その出口において流路面積が最小となる、請求項１〜３のうちいずれか一項記載のノズル。 The nozzle according to any one of claims 1 to 3, wherein the second flow path has a minimum flow path area at its outlet. 前記管体は、その内径が先端に向かって拡径するように次第に肉薄に形成されてなる、請求項１〜４のうちいずれか一項記載のノズル。 The nozzle according to any one of claims 1 to 4, wherein the tubular body is gradually formed to be thin so that its inner diameter increases toward the tip. 前記第２の流路は、大径面および小径面によって形成され、該大径面が前記噴射口に向かって次第に前記管体の中心軸に向かって前進する、請求項１〜５のうちいずれか一項記載のノズル。 Any of claims 1 to 5, wherein the second flow path is formed by a large-diameter surface and a small-diameter surface, and the large-diameter surface gradually advances toward the injection port toward the central axis of the pipe body. The nozzle described in item 1. 前記大径面が前記噴射口に向かう形状は、前記中心軸方向に沿った断面が、直線状、または当該ノズルの内部に向かって凹または凸の二次関数形状である、請求項６記載のノズル。 The shape according to claim 6, wherein the shape of the large-diameter surface toward the injection port is a quadratic function shape in which the cross section along the central axis direction is linear or concave or convex toward the inside of the nozzle. nozzle. 前記小径面は、前記管体の外面であり、前記管体の先端に向けて次第に前記大径面に接近するように拡径されると共に、該管体の内面は拡径される、請求項６記載のノズル。 The small diameter surface is an outer surface of the pipe body, and the diameter is gradually increased toward the tip of the pipe body so as to approach the large diameter surface, and the inner surface of the pipe body is expanded in diameter. Nozzle according to 6. 前記大径面に連続する前記噴射口の開口端が、前記管体の先端に向かって突出する、請求項６〜８のうちいずれか一項記載のノズル。 The nozzle according to any one of claims 6 to 8, wherein the open end of the injection port continuous with the large-diameter surface projects toward the tip of the tubular body. 前記第２の流路は、その出口において、前記大径面と前記小径面との距離が０．０１ｍｍ〜０．２０ｍｍである、請求項６〜９のうちいずれか一項記載のノズル。 The nozzle according to any one of claims 6 to 9, wherein the second flow path has a distance between the large-diameter surface and the small-diameter surface of 0.01 mm to 0.20 mm at its outlet. 前記噴射口は、開口位置から外側の内面の口径が開口位置から噴射方向に沿って漸次拡径するように形成されてなる、請求項１〜１０のうちいずれか一項記載のノズル。 The nozzle according to any one of claims 1 to 10, wherein the injection port is formed so that the diameter of the inner surface outside the opening position gradually increases from the opening position along the injection direction. 前記噴射口は、開口位置から外側の内面は、噴射方向に沿う断面形状が、該噴射口の中心軸に向かって凹または凸形状に形成されてなる、請求項１１記載のノズル。 The nozzle according to claim 11, wherein the nozzle has a cross-sectional shape along the injection direction on the inner surface outside the opening position, which is concave or convex toward the central axis of the injection port. 噴霧液の供給源と接続可能な第１の流路の後端部に連通する第１の接続部と、
気体の供給源と接続可能な第２の流路の後端部に連通する第２の接続部と、
請求項１〜１２のうちいずれか一項記載のノズルと、
を備えるスプレー。A first connection that communicates with the rear end of the first flow path that can connect to the spray solution source,
A second connection that communicates with the rear end of the second flow path that can connect to the gas source,
The nozzle according to any one of claims 1 to 12 and
With a spray. 前記噴霧液は、溶解液、分散液、ゲル状物質を含む液、またはエマルションである、請求項１３記載のスプレー。
13. The spray according to claim 13, wherein the spray solution is a solution, a dispersion, a solution containing a gel-like substance, or an emulsion.
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